Abstract: A flow control device is disclosed. The flow control device includes a solenoid, the solenoid including an armature. Also, a piston connected to the armature. The piston includes a primary orifice. The piston having an open position and a closed position. A piston spring connected to the piston is also includes and at least one secondary orifice. The movement of the piston to the open position at least partially opens the at least one secondary orifice and the movement of the piston to the closed position at least partially closes the at least one secondary orifice. The movement of the armature actuates the piston movement and controls fluid flow from the primary orifice through the at least one secondary orifice.

Abstract: An internal-combustion engine includes a cylinder having an upper, generally planar bounding surface formed by an inner wall portion of a cylinder head; a fuel injection device and a spark plug held in the cylinder head and opening into the cylinder; a piston axially slidably disposed in the cylinder; a combustion chamber defined between the upper bounding surface of the cylinder head and the top piston face when the piston is in its upper dead center position; and an annular ridge situated on the top piston face. The annular ridge subdivides the combustion chamber into an inner partial combustion chamber and an outer partial combustion chamber surrounding the inner partial combustion chamber. The inner partial combustion chamber is situated in an effective range of the fuel injection device and the spark plug. Further, throughgoing apertures are provided in the annular ridge for maintaining a continuous communication between the inner and outer partial combustion chambers.